JP7012947B2 - Washing toilet - Google Patents

Description

The present invention relates to a flush toilet, and more particularly to a flush toilet that is washed with washing water and discharges filth.

Conventionally, as a flush toilet that is washed with wash water and discharges filth, for example, as described in Patent Document 1, a ball tap provided in a water storage tank that stores the wash water supplied to the toilet body is used. The ones that have been prepared are known.
Such a conventional ball tap has a valve body that opens and closes a water supply port that supplies water to the water storage tank, a float mechanism that transmits the vertical movement of the water surface in the water storage tank, and a float mechanism that is connected to this float mechanism to respond to the vertical movement of the water surface. It is equipped with a lever mechanism that opens and closes the valve body. In addition, the valve body is provided with a means for deflecting the direction of the water supply flow so that the waviness of the water surface in the water storage tank due to the water supply at the time of water supply is suppressed and the water surface condition in the water storage tank is adjusted. It has become.
Next, in the conventional flush toilet described in Patent Document 2, the ball tap provided in the water storage tank is provided with a water discharge port in the tank and a water discharge port for make-up water, respectively. Further, the ball tap is provided with a water receiving member. This water receiving member can receive the water discharged from the make-up water discharge port and guide it to the outside of the overflow pipe to flow into the tank, so that the water surface condition in the water storage tank is adjusted.
Further, in the conventional flush toilet described in Patent Document 3, a water tray provided with a collision wall is provided in the water storage tank, and the flush water supplied by direct pressure from the water supply port inside the tank is provided. Is designed to be received in a water pan after colliding with a collision wall. The water pan is provided with a large number of drain holes that allow the water accumulated inside to flow out and drop into the tank, and the sound of the washing water passing through these drain holes and the washing water collide with the collision wall. The collision sound makes it possible to cancel the leakage of the user's excretion sound to the outside.
Further, in the conventional flush toilet described in Patent Document 4, a baffle plate is provided above the drain valve for opening and closing the drain port of the water storage tank and below the discharge port of the ball tap. As a result, the washing water discharged from the discharge port of the ball tap does not directly hit the drain valve by the baffle plate, so that the water supply pressure prevents the drain valve from being hindered from opening.

Japanese Unexamined Patent Publication No. 2019-44819 Japanese Unexamined Patent Publication No. 2013-28965 Japanese Unexamined Patent Publication No. 2010-203202 Japanese Patent Application Laid-Open No. 2003-201730

In these conventional water-washing toilets described above, how to control the state of the washing water and the water surface in the water storage tank is one of the important issues in order to achieve each purpose.
Further, as a further problem of controlling the state of the flush water and the water surface in the water storage tank, for example, a float switch provided with a detection unit that moves up and down according to the water level of the water storage tank in order to detect the water level in the water storage tank. When the water level detection means is adopted, there is a problem that an abnormal phenomenon called "chattering" occurs in which minute vibrations are repeated in the detection unit (float, etc.) depending on the degree of ripples on the water surface due to water supply to the water storage tank. Occurs.
In particular, when the detection unit (float or the like) of the float switch is not operated for a long period of time, there is a problem that water stain or the like is stuck to the detection unit, which may lead to malfunction.
Therefore, how to maintain the state in which the detection unit of the float switch is not fixed when the tank device is operated is one of the important issues from the viewpoint of equipment protection of the tank device.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and provides a flush toilet that can suppress malfunction of the float switch and enhance the reliability of the float switch. The purpose is to do.

In order to solve the above-mentioned problems, the present invention is a water-washing stool that is washed with washing water and discharges filth, and has a bowl portion that receives filth and a rim portion formed on the upper edge of the bowl portion. The tank device includes a toilet body provided with a drain trap portion for discharging filth in the bowl portion, and a tank device provided behind the toilet body to supply washing water to the toilet body. Is provided so as to be communicable with a water supply unit that supplies wash water supplied from a water supply source, a water storage tank body provided behind the toilet body and above the floor surface, and an upper part of the water storage tank body. A small tank to which the water supply pipe of the water supply unit is connected, a pump provided on the downstream side of the water storage tank body and pumping wash water flowing from the water storage tank body to the toilet body, and a pump in the water storage tank body. A float switch provided on the upper part and provided with a detection unit that moves up and down according to the water level in the water storage tank body, and a water supply unit and a drive unit of the pump are controlled based on the water level detected by the float switch. A controller and a collision portion are provided in the water storage tank main body, and the washing water supplied from the water supply portion to the water storage tank main body via the small tank collides with the collision portion. Is characterized in that the washing water after the collision is configured to land on the water surface on the float switch side in the water storage tank main body from the collision position above the detection unit of the float switch.
In the present invention configured as described above, the washing water supplied from the water supply unit to the water storage tank body via the small tank collides with the collision part in the water storage tank body, so that at least a part of the washing water is used. Can land on the water surface on the float switch side.
Since the water surface around the float switch detector in the water storage tank body can be ruffled by the landing of such wash water, the float switch detector is appropriately flooded by such rippling of the water surface. be able to.
Therefore, it is possible to prevent water stains and the like from sticking to the detection unit of the float switch, and it is possible to move the float switch smoothly up and down, so that the reliable operation of the float switch can be ensured and the float can be moved. The reliability of the switch can be increased.
Therefore, since it is possible to suppress the malfunction of the float switch at the time of water supply, it is possible to prevent the malfunction of the tank device and the overflow of the water level of the water storage tank body due to the malfunction of the float switch.

In the present invention, preferably, the pump further includes a water pipe extending upstream from the drive unit of the pump, and the water pipe is an outer side connecting the drive unit of the pump and the water storage tank main body. A water pipe and an inner water pipe connected to the upstream side of the outer water pipe and provided in the water storage tank main body are provided. The collision portion is provided in the inner water pipe, and the controller is provided. , The drive unit of the pump is controlled to be driven during the water supply from the water supply unit to the small tank.
In the present invention configured as described above, the drive unit of the pump is driven by the control of the controller during the water supply from the water supply unit to the small tank. Then, the washing water supplied from the water supply unit to the water storage tank body via the small tank collides with the collision portion of the inner water pipe in the water storage tank body.
At this time, since the vibration of the drive portion of the pump is transmitted to the collision portion of the inner water pipe via the outer water pipe, the collision portion itself can be finely vibrated.
As a result, the wash water that collides with the collision part during vibration lands on a wide range of water surface including the water surface on the float switch side in the water storage tank body, and the water surface in the water storage tank body can be undulated over a wide range. It is possible to appropriately cover the detection part of the float switch with water.
Therefore, it is possible to effectively suppress the sticking of the detection unit of the float switch, and it is possible to effectively suppress the malfunction of the float switch.
Furthermore, by controlling the controller, the drive unit of the pump can be driven during the water supply from the water supply unit to the small tank, and the washing water can be pumped from the water storage tank body to the toilet bowl body, and the water supply to the water storage tank body and the pump can be performed. It is possible to supply wash water to the toilet body at the same time.
As a result, even if the tank capacity is limited due to the water storage tank body and small tank being placed in the limited space behind the toilet bowl body, the water level of the water storage tank body suddenly rises during water supply, leading to overflow. The risk can be reduced.

In the present invention, preferably, the collision portion is formed by a curved curved surface on the upper surface of the inner water pipe.
In the present invention configured as described above, since the collision portion is formed by a curved curved surface on the upper surface of the inner water pipe in the water storage tank body, water is supplied from the water supply part to the water storage tank body via a small tank. When the washed water collides with the collision portion, it can flow down along a curved curved surface.
Therefore, it is possible to prevent the washing water that has collided with the collision part from splashing upward, and the washing water that has collided with the collision part efficiently land on the water surface in the water storage tank body and effectively wave. Since it can be made to stand up, it can be appropriately exposed to water to the extent that the detection portion of the float switch is not fixed.

In the present invention, preferably, the collision portion is provided on the upper surface of the inner water pipe located below the communication hole between the water storage tank main body and the small tank, and the detection portion of the float switch. It is located above the bottom edge.
In the present invention configured as described above, the washing water supplied from the water supply unit into the small tank flows into the water storage tank body through the communication hole with the water storage tank body, and at least a part of the washing water is discharged. It can collide with the collision part on the upper surface of the inner water pipe located below the communication hole.
Then, the washing water that has collided with the collision portion flows down along the curved curved surface of the collision portion on the upper surface of the inner water passage pipe, and lands on the water surface near the lower end of the detection portion of the float switch in the water storage tank body. , Can be ruffled more effectively.
Therefore, the detection portion of the float switch can be appropriately exposed to water to the extent that it does not stick.

In the present invention, preferably, the tank device is provided on the upstream side of the inner water pipe, and the suction pipe into which the washing water in the water storage tank body is sucked by operating the drive unit of the pump is provided. The collision portion is provided on the upper surface of the inner water pipe extending horizontally and horizontally from the downstream end of the suction pipe to the outer water pipe, and the float switch is provided in the axial direction of the inner water pipe. It is arranged on the side orthogonal to the.
In the present invention configured as described above, since the float switch is arranged on the side orthogonal to the axial direction of the inner water flow pipe in the water storage tank body, the washing water colliding with the collision portion is collected in the water storage tank body. It is possible to land on the inner water surface more efficiently and to make the water surface undulate even more effectively.
In addition, by arranging the float switch on the side orthogonal to the axial direction of the inner water passage pipe and keeping the distance between the detection part and the collision part of the float switch appropriate, the tank capacity of the water storage tank body is secured larger. be able to.

In the present invention, preferably, the drain trap portion extends in the front-rear direction from the inlet portion connected to the bowl portion toward the outlet portion behind the bowl portion in a plan view, and is the water storage tank main body. Is arranged so as to surround the upper part of the drain trap portion, the pump, and the outer water pipe from the left and right sides and the rear side.
In the present invention configured as described above, since the water storage tank main body is arranged so as to surround the upper part of the drain trap portion and the pump and the outer water pipe from the left and right sides and the rear side, the rear limit of the toilet bowl main body. The water storage tank body can be placed by effectively utilizing the reserved space.
Therefore, it is possible to reduce the size of the entire flush toilet while ensuring a larger tank capacity.

In the present invention, preferably, the water storage tank body has a large tank body having a large volume when the water storage tank body is divided into two at the center of the left and right, and a water storage tank body having a volume when the water storage tank body is divided into two at the center of the left and right. It has a left-right asymmetrical shape with a small tank body on the small side.
Each of the collision portion, the suction pipe, and the detection portion of the float switch is provided in the large tank main body portion.
In the present invention configured as described above, the water storage tank main body is formed into a left-right asymmetrical shape by the large tank main body and the small tank main body, and the collision portion, the suction pipe, and the detection portion of the float switch are respectively. By centrally providing it in the large tank part of the water storage tank body, it is possible to effectively utilize the limited space behind the toilet bowl body and secure a larger tank capacity.

In the present invention, preferably, the large tank main body is a rear large tank main body arranged on the rear side of the drain trap portion, and the drain trap portion extending forward from the rear large tank main body. It is provided with a large tank body on the front side arranged on one of the left and right sides, and a large tank body on the lower side extending downward from the large tank body on the rear side. The small tank body is a drain trap unit. A rear side small tank main body portion arranged on the rear side of the above, and a front side small tank main body portion extending forward from the rear side small tank main body portion and arranged on the left and right other sides of the drain trap portion . The front end of the front large tank body is arranged in front of the front end of the front small tank body, and the bottom surface of the lower large tank body is the rear small tank body and the rear small tank body. The float switch is located below the bottom surface of each of the front small tank main bodies, and the float switch is a single float switch provided above the rear large tank main body.
In the present invention configured as described above, regarding the water storage tank main body, the rear side large tank main body portion of the large tank main body portion, the front side large tank main body portion, the lower side large tank main body portion, and the rear side of the small tank main body portion. Each of the small tank body on the side and the small tank body on the front side can be shaped asymmetrically, and a float switch is provided above the large tank body on the rear side of the water storage tank body. Since it is a switch, the space occupied by the float switch can be suppressed.
Therefore, the limited space behind the toilet bowl body can be effectively utilized to secure a larger tank capacity, and the entire flush toilet bowl can be miniaturized.

According to the flush toilet of the present invention, the malfunction of the float switch can be suppressed, and the reliability of the float switch can be improved.

It is a schematic perspective view of the flush toilet according to one embodiment of the present invention viewed diagonally from the rear and from above. It is an overall block diagram of the flush toilet by one Embodiment of this invention. It is a partially enlarged plan view which enlarged the part of the tank unit of the flush toilet by one Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. It is a perspective view of the water storage tank of the flush toilet according to one Embodiment of this invention as seen diagonally rearward and above. It is a rear view of the water storage tank of the flush toilet according to one Embodiment of this invention. FIG. 3 is an enlarged partially enlarged plan view of a water receiving housing portion of a flush toilet according to an embodiment of the present invention shown in FIG. FIG. 3 is a cross-sectional view taken along the line VIII-VIII of FIG.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 is a schematic perspective view of a flush toilet according to an embodiment of the present invention as viewed diagonally backward and from above. Further, FIG. 2 is an overall configuration diagram of a flush toilet according to an embodiment of the present invention.
As shown in FIGS. 1 and 2, the flush toilet bowl 1 according to the embodiment of the present invention includes a pottery bowl main body 2 and a tank device 4 provided on the rear side thereof.
Further, the toilet body 2 has a bowl portion 2a that receives filth, a drain trap portion (drain trap pipe 2b) that extends from the bottom of the bowl portion 2a and discharges filth in the bowl portion 2a, and an upper edge of the bowl portion 2a. The rim portion 2c formed in the above is provided.

Next, as shown in FIGS. 1 and 2, the tank device 4 includes a water supply pipe 6 (water supply unit) and a water discharge pipe 8 connected to the upstream side and the downstream side, respectively.
The upstream side of the water supply pipe 6 is connected to an external water supply source (not shown) such as water supply. On the other hand, the downstream side of the water supply pipe 6 is connected to the water storage tank 10 (details will be described later) of the tank device 4. As a result, wash water is supplied from the water supply pipe 6 to the water storage tank 10.
Further, the water supply pipe 6 is provided with a water stop valve 12 and a valve unit 14, respectively, from the upstream side to the downstream side.
Further, the valve unit 14 includes a constant flow rate valve 16 provided in the water supply pipe 6 and a solenoid valve 18 for opening and closing an on-off valve (diaphragm valve 17) provided on the downstream side of the constant flow rate valve 16.

Next, as shown in FIGS. 1 and 2, the tank device 4 is further connected to a connecting unit 20 connected to the downstream side of the valve unit 14 of the water supply pipe 6 and to the downstream side of the connecting unit 20. It is provided with a tank unit 22 including a water storage tank 10.
In the valve unit 14, the flow rate of the washing water in the water supply pipe 6 is adjusted to be constant by the constant flow rate valve 16.
After that, when the solenoid valve 18 is electromagnetically opened and the flow path of the water supply pipe 6 is opened by the on-off valve (diaphragm valve 17), the washing water in the water supply pipe 6 passes through the connecting unit 20 to the tank unit 22. It is supposed to be supplied.
That is, the entire valve unit 14 functions together with the water supply pipe 6 as a water supply unit that supplies wash water supplied from a water supply source such as water supply to the water storage tank 10.

As shown in FIG. 2, the connecting unit 20 includes a water receiving housing 24 (small tank), an overflow pipe 26, and a check valve 28.
Further, the water receiving housing 24 has a lower opening 24a detachably connected to an upper opening 10a of the water storage tank 10 of the tank unit 22.
The details of the water receiving housing 24 and its peripheral portion will be described later.

Next, the overflow pipe 26 connects the overflow port 24b provided on a part of the side wall of the water receiving housing 24 and the water discharge pipe 8.
The upstream side of the water discharge pipe 8 is a connection pipe (washing water supply pipe) connected to the pump 30 of the tank device 4, and the downstream side thereof is connected to the rim headrace 2d inside the rim portion 2c of the toilet body 2. There is.
Further, the check valve 28 is provided in the overflow port 24b, and allows the washing water in the water receiving housing 24 to flow into the overflow pipe 26 from the overflow port 24b, while the washing water in the overflow pipe 26. Can prevent backflow into the water receiving housing 24.

Next, as shown in FIG. 2, the tank unit 22 includes a water storage tank 10, a pump 30, a float switch 32, a drain plug 34, a controller C, and the like, respectively.
The pump 30 is provided in a part (on the way) of the water passage pipe 36 connected to the upstream side of the water discharge pipe 8. The upstream end 36a of the water pipe 36 is connected to the downstream end 38a of the suction pipe 38 provided in the water storage tank 10.
The details of the water pipe 36 and the suction pipe 38 will be described later.

The washing water stored in the water storage tank 10 is sucked from the suction pipe 38 into the water passage pipe 36 by the operation of the pump 30, and then pumped to the water discharge pipe 8 via the pump 30. There is.
As a result, all of the washing water supplied from the water storage tank 10 to the discharge pipe 8 by the pump 30 is supplied from the inlet 2e of the rim headrace 2d into the rim headrace 2d.
Then, the washing water in the rim headrace 2d is discharged into the bowl portion 2a from the rim spout 2f at the downstream end of the rim headrace 2d, so that the toilet bowl cleaning (so-called toilet bowl cleaning with 100% rim water discharge) is performed. It has become.
That is, each of the water flow pipe 36 and the water discharge pipe 8 functions as a wash water supply pipe that supplies the wash water pumped from the water storage tank 10 by the pump 30 to the toilet bowl main body 2.

The float switch 32 detects the water level in the water storage tank 10. The opening / closing operation of the solenoid valve 18 of the valve unit 14 is controlled by the controller C based on the water level in the water storage tank 10 detected by the float switch 32.
Further, the operation of the pump 30 is also controlled by the controller C based on the water level in the water storage tank 10 detected by the float switch 32.
For example, when the water level in the water storage tank 10 detected by the float switch 32 is equal to or lower than a predetermined value, the solenoid valve 18 is opened, the water supply pipe 6 is opened, and the pump 30 is operated.
When the water level in the water storage tank 10 reaches a predetermined water level, the solenoid valve 18 is closed, the water supply pipe 6 is closed, and the pump 30 is stopped.
Further, under the control of the controller C, the pump 30 can be driven during the water supply from the water supply pipe 6 to the water storage tank 10, and the washing water can be pumped from the water storage tank 10 to the toilet body 2, and the water storage tank 6 can be used to pump the wash water. Water can be supplied to 10 and wash water can be supplied from the pump 30 to the toilet body 2 at the same time.

The drain plug 34 is provided on the bottom surface of the water storage tank 10. The drain plug 34 is always closed during normal use and is opened as needed so that the washing water in the water storage tank 10 can be discharged to the outside.

Next, the details of the water storage tank 10 of the tank unit 22 will be described with reference to FIGS. 3 to 6.
FIG. 3 is a partially enlarged plan view of an enlarged portion of the tank unit of the flush toilet according to the embodiment of the present invention. Further, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.
First, as shown in FIGS. 3 and 4, the water storage tank 10 of the tank unit 22 includes a single tank main body 40 and a dew-proof material 42 that covers the outside of the tank main body 40.
Next, FIG. 5 is a perspective view of the water storage tank of the flush toilet according to the embodiment of the present invention as viewed diagonally from the rear and from above. Further, FIG. 6 is a rear view of the water storage tank of the flush toilet according to the embodiment of the present invention.
As shown in FIGS. 3 to 6, assuming that the virtual vertical plane that divides the water storage tank 10 of the tank unit 22 into two at the center of the left and right is "vertical plane A1", the single tank body 40 of the water storage tank 10 and its outside thereof. The dew-proof material 42 is provided with a large tank portion 44 and a small tank portion 46 on the left and right sides of the vertical surface A1, and is divided into a large tank portion 44 and a small tank portion 46 on the left and right by the vertical surface A1. Has been done.
That is, as shown in FIG. 6, the large tank portion 44 is arranged on the left side of the vertical surface A1 when the tank main body 40 and the dew-proof material 42 are viewed from the back side, and the small tank portion 46 is the tank main body 40 and the dew-proof material 42. The material 42 is arranged on the right side of the vertical surface A1 when viewed from the back surface side, and the volume V1 of the large tank portion 44 is set to be larger than the volume V2 of the small tank portion 46 (V1> V2).
As a result, the water storage tank 10 has a left-right asymmetrical shape (generally a C-shaped or U-shaped irregular shape in a plan view) due to the large tank portion 44 and the small tank portion 46.

Further, as shown in FIGS. 1, 3 and 4, the drain trap pipe 2b of the toilet bowl body 2 is directed from the inlet portion 2g connected below the bowl portion 2a toward the outlet portion 2h behind the bowl portion 2a. It extends in the front-back direction.
Then, as shown in FIGS. 3 to 6, the large tank portion 44 of the water storage tank 10 is a rear side large tank portion 44a arranged on the rear side of the drain trap pipe 2b and a front side from the rear side large tank portion 44a. The front large tank section 44b, which extends to the left and right sides of the drain trap pipe 2b (on the right side when viewed from the front side of the toilet bowl body 2), and the lower large tank section extending downward from the rear large tank section 44a. It is equipped with 44c.
Next, as shown in FIGS. 3 to 6, the small tank portion 46 of the water storage tank 10 is from the rear side small tank portion 46a arranged on the rear side of the drain trap pipe 2b and the rear side small tank portion 46a. It is provided with a front side small tank portion 46b extending forward and arranged on the left and right other sides of the drain trap pipe 2b (left side when viewed from the front side of the toilet body 2).
That is, as shown in FIGS. 1, 3 and 4, the water storage tank 10 is arranged so as to surround the upper part of the drain trap pipe 2b from both the left and right sides and the rear side.

Next, as shown in FIG. 4, the toilet bowl main body 2 is a large tank that accommodates each of the large tank portion 44 and the small tank portion 46 at a position above the floor surface in the region rearward from the bowl portion 2a. It is provided with an accommodating portion S1 and a small tank accommodating portion S2, respectively.
That is, the large tank accommodating portion S1 is located on one of the left and right sides (vertical when the toilet bowl body 2 is viewed from the front side) with respect to the vertical surface A1 divided into two at the center of the left and right in the region rearward of the bowl portion 2a of the toilet bowl body 2. It is formed on the right side of the surface A1).
On the other hand, the small tank accommodating portion S2 is located on the left and right sides of the toilet bowl body 2 on the left and right sides with respect to the vertical plane A1 (on the left side of the vertical plane A1 when the toilet bowl body 2 is viewed from the front side) in the region rearward from the bowl portion 2a of the toilet bowl body 2. It is formed.

Further, as shown in FIGS. 4 to 6, in a state where each of the large tank portion 44 and the small tank portion 46 is installed in each of the large tank accommodating portion S1 and the small tank accommodating portion S2, the bottom surface of the large tank portion 44 is provided. The lowest position (the lowest position P1 of the bottom surface 44a of the lower large tank portion 44c) is the lowest position of the bottom surface of the small tank portion 46 (the lowest position P2 of the bottom surface 46c of the rear side small tank portion 46a and the front side small tank portion 46b). It is located below.
Further, as shown in FIGS. 4 to 6, in a state where each of the large tank portion 44 and the small tank portion 46 is installed in each of the large tank accommodating portion S1 and the small tank accommodating portion S2, the upper surface of the large tank portion 44 is provided. (The highest position P3 of the upper surface 44e of the front side large tank portion 44b) is located above the highest position P4 of the rear side small tank portion 46a of the small tank portion 46 and the upper surface 46d of the front side small tank portion 46b. Moreover, it is located below the upper surface 2i of the rim portion 2c of the toilet bowl body 2.
Further, as shown in FIGS. 3 to 6, the position P5 of the front end 44f of the front large tank portion 44b is located ahead of the position P6 of the front end 46e of the front small tank portion 46b.

Incidentally, as shown in FIGS. 2 and 4, the suction pipe 38 is provided over both the rear side large tank portion 44a and the lower side large tank portion 44c of the large tank portion 44 of the tank body 40. The upstream end 36a of the water pipe 36 extending from the pump 30 to the upstream side (side) is watertightly connected to the downstream end 38a of the suction pipe 38 which is a part of the large tank portion 44.
Further, as shown in FIG. 3, the upstream end of the water discharge pipe 8 is connected to the downstream end of the water pipe 36 extending downstream (upward) from the pump 30, and the downstream end (outlet portion 8a) of the water discharge pipe 8 is connected. ) Is connected to the inlet 2e of the rim headrace 2d on the left and right opposite sides of the toilet bowl body 2 with respect to the vertical plane A1 (on the left side of the vertical plane A1 when the toilet bowl body 2 is viewed from the front side).

Next, as shown in FIG. 4, in the large tank portion 44, the side wall surface 44 g on the vertical surface A1 side (left and right center side) is outside the drain trap pipe 2b (drain trap pipe 2b) in the large tank accommodating portion S1. It is located on the right side when viewed from the front side).
Similarly, in the small tank portion 46, the side wall surface 46f on the vertical surface A1 side (left and right center side) is outside the drain trap pipe 2b in the small tank accommodating portion S2 (the left side of the drain trap pipe 2b when viewed from the front side). Is located in.
Further, as shown in FIGS. 4 and 5, the drain trap pipe 2b is provided in the center of the left and right of the toilet bowl main body 2, and the upstream end 36a of the water pipe 36 is the drainage of the left and right side surfaces of the large tank portion 44. It is connected to the side wall surface 44g on the trap tube 2b side.

Further, as shown in FIGS. 3 and 4, the pump 30 is arranged behind the bowl portion 2a of the toilet bowl body 2 and above the drain trap pipe 2b.
Further, the pump 30 is arranged on the front side of the rear side large tank portion 44a and the rear side small tank portion 46a, and is located in the left-right direction between the front side large tank portion 44b and the front side small tank portion 46b. It is placed in the space of.
As a result, the pump 30 is provided on the left and right center sides of the toilet body 2 with respect to the upstream end 36a of the water pipe 36 and the downstream end (outlet portion 8a) of the water discharge pipe 8.

Next, with reference to FIGS. 1 to 8, the water receiving housing 24 (small tank) of the connecting unit 20 of the flush toilet bowl 1 according to the embodiment of the present invention, and the water pipes on the outside and inside of the water storage tank 10. The details of 36 and the suction pipe 38 will be described.
FIG. 7 is a partially enlarged plan view of an enlarged water receiving housing portion of the flush toilet according to the embodiment of the present invention shown in FIG. Further, FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG.
The water receiving housing 24 of the connecting unit 20 shown in FIGS. 4 and 7 shows a state in which the upper lid 48 of the water receiving housing 24 shown in FIG. 3 is removed.
First, as shown in FIGS. 4 and 7, in the water receiving housing 24 of the connecting unit 20, the water supply pipe 6 is connected above the side wall 24c on the left side when viewed from the front side of the toilet body 2. A water supply nozzle 50 (water supply unit) extending to the inside of the water receiving housing 24 is provided on the downstream side of the water supply pipe 6.
Further, a water supply port 50a (water supply unit) directed downward is provided at the tip of the water supply nozzle 50.
Further, an overflow pipe 26 is connected to the overflow port 24b below the side wall 24c of the water receiving housing 24 via a check valve 28.

Next, as shown in FIGS. 4, 7, and 8, the suction pipe 38 in the water storage tank 10 extends in the vertical and horizontal directions from the vertical water pipe 52 and the upper end of the vertical water pipe 52. It is provided with a horizontal water pipe 54.
Further, the water pipe 36 extends in the horizontal left-right direction (upstream side) from the drive portion D of the pump 30, and its upstream end 36a is connected from the outside to the side wall surface 44g of the large tank portion 44 of the water storage tank 10. It is an outer water pipe.
Further, the horizontal water pipe 54 of the suction pipe 38 has an inner water pipe whose downstream end 38a is connected to the upstream end 36a of the water pipe 36 (outer water pipe) and is arranged in the large tank portion 44 of the water storage tank 10. It has become.
Further, the downstream end 38a of the horizontal water pipe 54 (inner water pipe) is watertightly connected to the upstream end 36a of the outer water pipe 36 (outer water pipe) at the side wall surface 44g of the large tank portion 44 of the water storage tank 10. Has been done.
Incidentally, since the horizontal water pipe 54 is formed in a cylindrical shape, the collision portion (collision region surface B) formed on the upper surface 54a of the horizontal water pipe 54 is formed of a curved curved surface.

Next, as shown in FIGS. 4, 7, and 8, the collision region surface B (collision portion) provided on the upper surface 54a of the horizontal water pipe 54 (inner water pipe) is the water storage tank 10 (water storage tank main body). ) And the water receiving housing 24 (small tank) are located below the communication hole 56.
The height position P7 of the collision region surface B is located above the lower end (position P8) of the detection unit 32a of the float switch 32.
Further, as shown in FIGS. 7 and 8, the float switch 32 is a single float switch arranged in the water storage tank 10 on the side (rear side) orthogonal to the axial direction of the horizontal water pipe 54. 32.

As a result, as shown in FIGS. 4, 7 and 8, the washing water W discharged from the water supply port 50a has a lower opening 24a of the water receiving housing 24 (small tank) and a water storage tank 10 (water storage tank main body). It is adapted to pass through the communication hole 56 with the upper opening 10a of the above.
Then, as shown in FIGS. 4, 7 and 8, the water supply (washing water W) that has passed through the communication hole 56 and has flowed into the water storage tank 10 is the collision portion (collision region) of the upper surface 54a of the horizontal water pipe 54. After landing on the surface B), at least a part of the washing water W is adapted to land on the water surface WL on the float switch 32 side in the water storage tank 10.
As a result, the water surface WL near the lower end of the detection unit 32a of the float switch 32 in the large tank portion 44a on the rear side of the water storage tank 10 is rippling.
Then, since water droplets or mist-like water droplets due to fine scattering adhere to the detection unit 32a of the float switch 32, the detection unit 32a of the float switch 32 is kept in a moist state and can operate without being stuck at all times. It has become.
Incidentally, the detection unit 32a of the float switch 32 is turned on when the water surface WL in the water storage tank 10 rises and comes into contact with the lower end of the detection unit 32a.
On the other hand, when the water surface WL in the water storage tank 10 is lower than the lower end position of the detection unit 32a of the float switch 32, the detection unit 32a of the float switch 32 is turned off.

Next, with reference to FIGS. 1 to 8, the operation of the flush toilet bowl 1 according to the above-described embodiment of the present invention will be described.
According to the water-washing stool 1 according to the present embodiment, as shown in FIGS. 4, 7, and 8, the water storage tank 10 (water storage tank main body) passes from the water supply port 50a of the water supply nozzle 50 to the water receiving housing 24 (small tank). ), The wash water W that has been supplied into the water falls and collides with the collision region surface B on the upper surface 54a of the horizontal water pipe 54 in the large tank portion 44b on the front side of the water storage tank 10 from above.
As a result, at least a part of the washing water W can land on the water surface WL on the float switch 32 side.
By landing the washing water W in this way, the water surface around the detection unit 32 of the float switch 32 in the large tank portion 44a on the rear side of the water storage tank 10 can be ruffled. Therefore, the detection unit 32a of the float switch 32 can be appropriately flooded by the ripple of the water surface WL.
Therefore, it is possible to prevent water stains and the like from sticking to the detection unit 32a of the float switch 32, and it is possible to smoothly move the float switch 32 up and down.
Therefore, the reliable operation of the float switch can be ensured, and the reliability of the float switch can be improved.
Further, since the malfunction of the float switch 32 at the time of water supply can be suppressed, the malfunction of the tank device 4 and the overflow of the water level WL in the water storage tank 10 due to the malfunction of the float switch 32 can be prevented.

Next, according to the flush toilet bowl 1 according to the present embodiment, water is supplied from the water supply port 50a (water supply unit) of the water supply nozzle 50 to the water receiving housing 24 (small tank), and the drive unit of the pump 30 is controlled by the controller C. D is driven.
Then, the washing water W supplied from the water supply port 50a of the water supply nozzle 50 to the water storage tank 10 via the water receiving housing 24 is a horizontal water pipe 54 (inner water pipe) in the large tank portion 44b on the front side of the water storage tank 10. Collides with the collision region surface B of the upper surface 54a.
At this time, since the vibration of the drive unit D of the pump 30 is transmitted to the collision region surface B of the horizontal water pipe 54 (inner water pipe) via the water pipe 36 (outer water pipe), the collision region surface B itself is transmitted. It can be vibrated finely.
As a result, the washing water W that has collided with the collision region surface B during vibration can land on a wide range of water surface WL including the water surface on the float switch 32 side in the large tank portion 44a on the rear side of the water storage tank 10. .. As a result, the water surface WL in the water storage tank 10 can be undulated over a wide range, and the detection unit 32a of the float switch 32 can be appropriately flooded.
Therefore, it is possible to effectively suppress the detection unit 32a of the float switch 32 from sticking, and it is possible to effectively suppress the malfunction of the float switch 32.
Further, under the control of the controller C, the drive unit D of the pump 30 is driven to supply water from the water supply port 50a of the water supply nozzle 50 to the water receiving housing 24, and the wash water is pumped from the water storage tank 10 to the toilet body 2. It is possible to supply water to the water storage tank 10 and supply wash water from the pump 30 to the toilet body 2 at the same time.
As a result, even if the tank capacity is limited due to the water storage tank 10 and the water receiving housing 24 being arranged in the limited space behind the toilet bowl body 2, the water level WL in the water storage tank 10 rises sharply during water supply. This can reduce the risk of overflow.

Next, according to the flush toilet bowl 1 according to the present embodiment, the collision region surface B has a curved curved surface on the upper surface 54a of the horizontal water pipe 54 (inner water pipe) in the large tank portion 44b on the front side of the water storage tank 10. It is formed.
As a result, when the washing water W supplied from the water supply port 50a of the water supply nozzle 50 through the water receiving housing 24 into the water storage tank 10 collides with the collision region surface B, it can flow down along a curved curved surface. ..
Therefore, it is possible to prevent the washing water W colliding with the collision region surface B from splashing upward, and the washing water W colliding with the collision region surface B efficiently lands on the water surface in the water storage tank 10. However, it can be effectively ruffled.
Therefore, the detection unit 32a of the float switch 32 can be appropriately exposed to water to the extent that it does not stick.

Next, according to the flush toilet bowl 1 according to the present embodiment, the collision region surface B is located below the communication hole 56 between the water receiving housing 24 and the water storage tank 10, and the lower end of the detection unit 32a of the float switch 32. It is located above.
As a result, the wash water W supplied into the water receiving housing 24 from the water supply port 50a of the water supply nozzle 50 flows into the water storage tank 10 from the communication hole 56 between the water receiving housing 24 and the water storage tank 10, and at least one of them. The washing water W of the portion can collide with the collision region surface B of the upper surface 54a of the horizontal water pipe 54 (inner water pipe) located below the communication hole 56.
Then, the washing water W that has collided with the collision region surface B flows down along the curved curved surface of the collision region surface B of the upper surface 54a of the horizontal water pipe 54, and the detection unit 32a of the float switch 32 in the water storage tank 10 flows down. It can land on the water surface near the lower end of the water and make it undulate more effectively.
Therefore, the detection unit 32a of the float switch 32 can be appropriately exposed to water to the extent that it does not stick.

Next, according to the flush toilet bowl 1 according to the present embodiment, the float switch 32 is arranged on the side (rear side) orthogonal to the axial direction of the horizontal water pipe 54 in the water storage tank 10.
As a result, the washing water W that has collided with the collision region surface B can land on the water surface WL in the water storage tank 10 more efficiently, and can make the water surface WL undulate even more effectively.
Further, in the water storage tank 10, the float switch 32 is arranged on the side orthogonal to the axial direction of the horizontal water pipe 54 to maintain an appropriate distance between the detection unit 32a of the float switch 32 and the collision region surface B. , The tank capacity of the water storage tank 10 can be secured larger.

Next, according to the flush toilet bowl 1 according to the present embodiment, the water storage tank 10 surrounds the upper part of the drain trap pipe 2b, and the pump 30 and the water pipe 36 (outer water pipe) from both the left and right sides and the rear side. Is located in.
As a result, the water storage tank 10 can be arranged by effectively utilizing the limited space behind the toilet bowl main body 2.
Therefore, the entire flush toilet bowl 1 can be miniaturized while ensuring a larger tank capacity of the water storage tank 10.

Next, according to the flush toilet bowl 1 according to the present embodiment, the water storage tank 10 has a left-right asymmetrical shape formed by the large tank portion 44 and the small tank portion 46, and the collision region surface B, the suction pipe 38, and the float are formed. By centrally providing each of the detection units 32a of the switch 32 in the large tank portion 44 of the water storage tank 10, the limited space behind the toilet bowl body 2 can be effectively utilized to further increase the tank capacity of the water storage tank 10. It can be secured to a large extent.

Next, according to the flush toilet bowl 1 according to the present embodiment, regarding the water storage tank 10, the rear side large tank portion 44a, the front side large tank portion 44b, the lower side large tank portion 44c, and the small tank portion 44 of the large tank portion 44 are provided. Each of the rear side small tank portion 46a and the front side small tank portion 46b of the portion 46 can form a left-right asymmetrical shape.
Further, since the float switch 32 is a single float switch 32 provided above the large tank portion 44a on the rear side of the water storage tank 10, the space occupied by the float switch 32 can be suppressed.
Therefore, the limited space behind the toilet bowl body 2 can be effectively utilized to secure a larger tank capacity of the water storage tank 10, and the entire flush toilet bowl 1 can be miniaturized.

1 Washing toilet according to one embodiment of the present invention 2 Toilet bowl body 2a Bowl part 2b Drain trap pipe (drain trap part)
2c Rim part 2d Rim headrace 2e Rim headrace inlet 2f Rim spout 2g Drain trap pipe inlet 2h Drain trap pipe outlet 2i Rim top surface 4 Tank device 6 Water supply pipe (water supply)
8 Water discharge pipe 8a Outlet of water discharge pipe 10 Water storage tank (water storage tank body)
10a Upper opening 10b Outer upper surface of water storage tank 12 Stopcock 14 Valve unit (water supply part)
16 Constant flow valve 17 Diaphragm valve 18 Solenoid valve 20 Connecting unit 22 Tank unit 24 Water receiving housing (small tank)
24a Lower opening 24b Overflow port 24c Side wall of water receiving housing 26 Overflow pipe 28 Check valve 30 Pump 32 Float switch 32a Detection part 34 Drain plug 36 Water pipe (outer water pipe)
36a Upstream end of water pipe 38 Suction pipe 38a Downstream end of suction pipe 40 Tank body 40a Bottom of tank body 42 Dew-proof material 42a Outer top surface of dew-proof material 44 Large tank part 44a Rear side large tank part 44b Front side large tank part 44c Lower side large tank part 44d Bottom side of lower side large tank part 44e Upper surface of front side large tank part 44f Front end of front side large tank part 44g Side wall surface of large tank part 46 Small tank part 46a Rear side small tank part 46b Front side Small tank part 46c Bottom side of rear side small tank part and front side small tank part 46d Top surface of rear side small tank part 46e Front end of front side small tank part 46f Side wall surface of small tank part 48 Top lid of water receiving housing 50 Water supply nozzle ( Water supply department)
50a Water supply port (water supply section)
52 Vertical water pipe 54 Horizontal water pipe (inner water pipe)
54a Upper surface of horizontal water pipe 56 Communication hole (communication hole between small tank and water storage tank body)
A1 Lead plane that divides the water storage tank into two at the center of the left and right B Collision area surface (collision part)
C controller D Pump drive part P1 Lowest position on the bottom of the large tank part (lower side large tank part) P2 Minimum position on the bottom of the small tank part (rear side small tank part and front side small tank part) P3 Large tank part ( Highest position of the upper surface of the front side large tank part P4 Highest position of the upper surface of the small tank part (rear side small tank part) P5 Front end position of the front side large tank part P6 Front end position of the front side small tank part P7 Height of the collision part Position P8 Lower end position of the detection part of the float switch S1 Large tank housing part of the toilet bowl S2 Small tank housing part of the toilet bowl V1 Volume of the large tank part V2 Volume of the small tank part W Washing water WL Water level and water surface in the water storage tank

Claims (8)

A flush toilet that is washed with wash water and discharges filth.
A toilet bowl body provided with a bowl portion that receives filth, a rim portion formed on the upper edge of the bowl portion, and a drain trap portion that discharges filth in the bowl portion.
It has a tank device provided behind the toilet bowl body and supplies washing water to the toilet bowl body.
The tank device has a water supply unit that supplies wash water supplied from a water supply source and a water supply unit.
The water storage tank body provided behind the toilet body and above the floor,
A small tank that is provided at the top of the water storage tank body so that it can communicate with each other and to which the water supply pipe of the water supply unit is connected.
A pump provided on the downstream side of the water storage tank body and pumping the washing water flowing from the water storage tank body to the toilet body.
A float switch provided at the upper part of the water storage tank body and provided with a detection unit that moves up and down according to the water level in the water storage tank body.
It is equipped with a controller that controls the water supply unit and the drive unit of the pump based on the water level detected by the float switch.
In the water storage tank main body, a collision part is provided in which the washing water supplied from the water supply part through the small tank to the water storage tank main body collides with each other, and this collision part is the washing water after the collision. A water-washing stool that is configured to land water on the water surface on the float switch side in the water storage tank body from a collision position above the detection unit of the float switch. The pump further includes a water pipe extending upstream from the drive unit of the pump, and the water pipe includes an outer water pipe connecting the drive unit of the pump and the water storage tank main body, and the outer water pipe. It is equipped with an inner water pipe that is connected to the upstream side of the water pipe and is provided inside the water storage tank body.
The flush toilet according to claim 1, wherein the collision portion is provided in the inner water pipe, and the controller controls the drive portion of the pump to be driven during water supply from the water supply portion to the small tank. The flush toilet according to claim 2, wherein the collision portion is formed of a curved curved surface on the upper surface of the inner water pipe. The collision portion is provided on the upper surface of the inner water pipe located below the communication hole between the water storage tank main body and the small tank, and is located above the lower end of the detection portion of the float switch. The flush toilet according to claim 2 or 3. The tank device further includes a suction pipe provided on the upstream side of the inner water pipe and for sucking the washing water in the water storage tank body by operating the drive unit of the pump. Is provided on the upper surface of the inner water pipe extending in the horizontal left-right direction from the downstream end of the suction pipe to the outer water pipe.
The flush toilet according to any one of claims 2 to 4, wherein the float switch is arranged on a side orthogonal to the axial direction of the inner water pipe. The drain trap portion extends in the front-rear direction from the inlet portion connected to the bowl portion toward the outlet portion behind the bowl portion in a plan view.
The water-washing toilet according to claim 5, wherein the water storage tank main body is arranged so as to surround the upper part of the drain trap portion, the pump, and the outer water pipe from the left and right sides and the rear side. The water storage tank body is a large tank body that has a large volume when it is divided into two at the center of the left and right, and a small tank body that has a small volume when the water storage tank body is divided into two at the center of the left and right. It has a left-right asymmetrical shape with a part,
The flush toilet according to claim 5 or 6, wherein each of the collision portion, the suction pipe, and the detection portion of the float switch is provided in the large tank main body portion. The large tank main body is arranged on one of the left and right sides of the rear large tank main body arranged on the rear side of the drain trap portion and the rear large tank main body extending forward from the rear large tank main body. It is equipped with a large tank body on the front side and a large tank body on the lower side extending downward from the large tank body on the rear side.
The small tank main body is arranged on the left and right sides of the rear small tank main body arranged on the rear side of the drain trap portion and the rear small tank main body extending forward from the rear small tank main body. Equipped with a small tank body on the front side,
The front end of the front side large tank main body is arranged in front of the front end of the front side small tank main body.
The bottom surface of the lower large tank body is located below the bottom surfaces of the rear small tank body and the front small tank body.
The flush toilet according to claim 7, wherein the float switch is a single float switch provided above the rear side large tank main body.

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